Jewel thieves become interested in an invisibility formula invented by Professor Nakazato and want to use his invention to acquire a diamond necklace called the “Tears of Amour.”

The story of Sanshiro, a strong stubborn youth, who travels into the city in order to learn Jujutsu. However, upon his arrival he discovers a new form of self-defence: Judo….

Matsugoro is a poor rickshaw driver whose animated spirit and optimistic demeanor make him a favorite of the town. Matsu helps an injured boy, Toshio, and is hired by the…